1.Carbon Steel Reducer 2.Size: 1/2"-72" 3.Wall Thickness: SCH20,STD,SCH40,SCH80,SCH160,XXS 4.Standard: ANSI,ASME,ASTM,JIS,DIN ... "4. Wall Thickness: SCH20,STD,SCH40,SCH80,SCH160,XXS5. Material: ASTM A234 WPB, ST35.8, ST37, WP11, 20#, Q2356. Surface treatment ... : black painting,Anti-rust varnish oil,hot galvanizing or as customer's special requirement 1/2 ...